Boat chair or similar article



FIG. 1 is a perspective view of a boat chair or similar article, showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a side elevational view thereof, the opposite side being a mirror image thereto; and

FIG. 4 is a bottom view thereof. 

The ornamental design for a boat chair or similar article, as shown and described. 